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NSR database version of May 30, 2024.

Search: Author = J.M.Keatings

Found 23 matches.

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2023BR10      Phys.Lett. B 847, 138310 (2023)

A.D.Briscoe, R.D.Page, J.Uusitalo, D.T.Joss, M.A.M.AlAqeel, B.Alayed, B.Andel, S.Antalic, K.Auranen, H.Ayatollahzadeh, H.Badran, L.Barber, G.Beeton, M.Birova, V.Bogdanoff, R.M.Clark, J.G.Cubiss, D.M.Cullen, J.Deary, U.Forsberg, T.Grahn, P.T.Greenlees, J.B.Hilton, A.Illana, H.Joukainen, D.S.Judson, R.Julin, H.Jutila, J.M.Keatings, M.Labiche, M.Leino, M.C.Lewis, J.Louko, M.Luoma, I.Martel, A.McCarter, P.P.McKee, P.Mosat, S.N.Nathaniel, O.Neuvonen, D.O'Donnell, J.Ojala, C.A.A.Page, A.M.Plaza, J.Pakarinen, P.Papadakis, E.Parr, J.Partanen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, B.Saygi, J.Smallcombe, J.F.Smith, J.Sorri, C.M.Sullivan, S.Szwec, H.Tann, A.Tolosa-Delgado, E.Uusikyla, M.Venhart, L.J.Waring, G.Zimba

Decay spectroscopy at the two-proton drip line: Radioactivity of the new nuclides 160Os and 156W

RADIOACTIVITY 160Os(α), 156W(β+), (EC), 156Ta(p) [from 106Cd(58Ni, X)160Os, 102Pd(58Ni, X)156Ta, E=310, 294 MeV]; measured decay products, Eα, Iα, Ep, Ip, Eβ, Iβ; deduced α-particles energies, T1/2, an improved value for the half-life of the proton-decaying high-spin isomeric state. Comparison with available data. The recoil separator MARA, the Accelerator Laboratory of the University of Jyvaskyla.

doi: 10.1016/j.physletb.2023.138310
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2022PA09      Phys.Rev. C 105, 034303 (2022)

E.Parr, J.F.Smith, P.T.Greenlees, P.A.Butler, K.Auranen, R.Chapman, D.M.Cox, D.M.Cullen, L.P.Gaffney, T.Grahn, E.T.Gregor, L.Grocutt, A.Herzan, R.-D.Herzberg, D.Hodge, U.Jakobsson, R.Julin, S.Juutinen, J.M.Keatings, J.Konki, M.Leino, P.P.McKee, C.McPeake, D.Mengoni, A.K.Mistry, B.S.Nara Singh, G.G.O'Neill, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, M.Scheck, C.Scholey, M.Siciliano, M.Smolen, J.Sorri, P.Spagnoletti, K.M.Spohr, S.Stolze, M.J.Taylor, J.Uusitalo

Single-particle states and parity doublets in odd-Z 221Ac and 225Pa from α-decay spectroscopy

RADIOACTIVITY 225Pa, 221Ac(α)[225Pa from 208Pb(20Ne, 2np), E=105 MeV, 221Ac from 208Pb(18O, 4np), E=95 MeV, 208Pb(20Ne, 2npα), E=105 MeV and 225Pa α decay]; 217Fr(α)[from 221Ac α decay]; 213At(α)[from 217Fr α decay]; measured reaction products, Eα, Iα, Eγ, Iγ, αγ-coin, summed α+ce(K); deduced T1/2 decays of ground states of 225Pa, 221Ac, 217Fr, 213At. 221Ac, 217Fr; deduced levels, J, π, α- and γ-branching ratios, total conversion coefficients, multipolarities, α-hindrance factors, configurations, parity-doublet states in 221Ac. 225Pa; deduced ground state J, π. Comparison with previous experimental data, and with model predictions. RITU gas-filled recoil separator, silicon strip detectors (DSSD) for ion implantation measurements and GREAT spectrometer combined with 3 HPGe clover detectors at the University of Jyvaskyla accelerator facility.

doi: 10.1103/PhysRevC.105.034303
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2022SP01      Phys.Rev. C 105, 024323 (2022)

P.Spagnoletti, P.A.Butler, L.P.Gaffney, K.Abrahams, M.Bowry, J.Cederkall, T.Chupp, G.de Angelis, H.De Witte, P.E.Garrett, A.Goldkuhle, C.Henrich, A.Illana, K.Johnston, D.T.Joss, J.M.Keatings, N.A.Kelly, M.Komorowska, J.Konki, T.Kroll, M.Lozano, B.S.Nara Singh, D.O'Donnell, J.Ojala, R.D.Page, L.G.Pedersen, C.Raison, P.Reiter, J.A.Rodriguez, D.Rosiak, S.Rothe, M.Scheck, M.Seidlitz, T.M.Shneidman, B.Siebeck, J.Sinclair, J.F.Smith, M.Stryjczyk, P.Van Duppen, S.Vinals, V.Virtanen, K.Wrzosek-Lipska, N.Warr, M.Zielinska

Coulomb excitation of 222Rn

NUCLEAR REACTIONS 120Sn, 60Ni(222Rn, 222Rn'), E=4.23 MeV/nucleon [secondary 222Rn beam produced in Th(p, X), E=1.4 GeV reaction]; measured reaction products, Eγ, Iγ, (particle)γ-coin. 222Rn; deduced levels, J, π, E1, E2 and E3 matrix elements, high-spin levels, bands, intrinsic quadrupole and octupole moments. GOSIA analysis of Coulomb excitation cross sections. Miniball HPGe array at HIE-ISOLDE. Systematics of quadrupole moments and other parameters in even-A Ra and Rn isotopes.

doi: 10.1103/PhysRevC.105.024323
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2021HE13      Eur.Phys.J. A 57, 132 (2021)

J.Heery, L.Barber, J.Vilhena, B.S.Nara Singh, R.-D.Herzberg, D.M.Cullen, C.Muller-Gatermann, G.Beeton, M.Bowry, A.Dewald, T.Grahn, P.T.Greenlees, A.Illana, R.Julin, S.Juutinen, J.M.Keatings, M.Leino, M.Luoma, D.O'Donnell, J.Ojala, J.Pakarinen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, J.Sinclair, J.F.Smith, J.Sorri, P.Spagnoletti, H.Tann, J.Uusitalo, G.Zimba

Lifetime measurements of yrast states in 178Pt using the charge plunger method with a recoil separator

NUCLEAR REACTIONS 152Sm(32S, X)178Pt, E=192 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, level lifetimes, quadrupole moments, B(E2). The differential decay curve method (DDCM) framework, JUROGAM3 spectrometer.

doi: 10.1140/epja/s10050-021-00425-8
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2021KA13      Phys.Rev. C 103, 024319 (2021)

B.P.Kay, J.P.Schiffer, S.J.Freeman, T.L.Tang, B.D.Cropper, T.Faestermann, R.Hertenberger, J.M.Keatings, P.T.MacGregor, J.F.Smith, H.-F.Wirth

Consistency of nucleon-transfer sum rules in well-deformed nuclei

NUCLEAR REACTIONS 154,156,157,158Gd, 156,158,160,162,164Dy, 168,170,172,174Yb, 162,164,166,168,170Er(d, p), (d, t), E=12.1 MeV; analyzed cross section data from neutron-adding and neutron-removing reactions from experiments at Niels Bohr Institute (NBI), and reported in 1966Bu16, 1967Tj01, 1969Tj01 and 1970Gr46, and complemented by new experiments at MLL-Munich; deduced consistent nucleon-transfer sum rules, as defined in Nilsson-model framework, in well-deformed nuclei.

NUCLEAR REACTIONS 170Er, 174Yb(d, p), (d, t), E=12 MeV; 170Er, 174Yb(p, d), E=18 MeV; measured proton, triton and deuteron spectra, differential σ(θ) using Q3D magnetic spectrometer at the MLL-Munich MP tandem accelerator. 169,171Er, 173,175Yb; deduced levels, J, π, Nilsson configurations, sum rules.

doi: 10.1103/PhysRevC.103.024319
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2021MA62      Phys.Lett. B 820, 136569 (2021)

K.R.Mashtakov, V.Yu.Ponomarev, M.Scheck, S.W.Finch, J.Isaak, M.Zweidinger, O.Agar, C.Bathia, T.Beck, J.Beller, M.Bowry, R.Chapman, M.M.R.Chishti, U.Friman-Gayer, L.P.Gaffney, P.E.Garrett, E.T.Gregor, J.M.Keatings, U.Koster, B.Loher, A.D.MacLean, D.O'Donnell, H.Pai, N.Pietralla, G.Rainovski, M.Ramdhane, C.Romig, G.Rusev, D.Savran, G.S.Simpson, J.Sinclair, K.Sonnabend, P.Spagnoletti, A.P.Tonchev, W.Tornow

Structure of high-lying levels populated in the 96Y → 96Zr β decay

RADIOACTIVITY 96Y(β-) [from 235U(n, F), E thermal]; measured decay products, Eγ, Iγ, Eβ, Iβ; deduced γ-ray energies, B(E1), branching ratios, Gamow-Teller transition probabilities B(GT). Quasiparticle Phonon Model. Institut Laue Langevin (ILL), LOHENGRIN separator.

doi: 10.1016/j.physletb.2021.136569
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2021MO10      Phys.Rev. C 103, 034320 (2021)

B.Moon, A.Jungclaus, H.Naidja, A.Gargano, R.Lozeva, C.-B.Moon, A.Odahara, G.S.Simpson, S.Nishimura, F.Browne, P.Doornenbal, G.Gey, J.Keatings, G.Lorusso, Z.Patel, S.Rice, M.Si, L.Sinclair, P.-A.Soderstrom, T.Sumikama, J.Taprogge, H.Watanabe, J.Wu, Z.Y.Xu, A.Yagi, D.S.Ahn, H.Baba, F.L.Bello Garrote, S.Bonig, R.Daido, J.M.Daugas, F.Didierjean, F.Drouet, Y.Fang, N.Fukuda, R.Gernhauser, B.Hong, E.Ideguchi, S.Ilieva, N.Inabe, T.Ishigaki, T.Isobe, H.S.Jung, D.Kameda, I.Kojouharov, T.Komatsubara, T.Kroll, T.Kubo, N.Kurz, Y.K.Kwon, C.S.Lee, P.Lee, Z.Li, A.Montaner-Piza, S.Morimoto, K.Moschner, D.Mucher, D.Murai, M.Niikura, H.Nishibata, I.Nishizuka, R.Orlandi, H.Sakurai, H.Schaffner, Y.Shimizu, K.Steiger, H.Suzuki, H.Takeda, K.Tshoo, Zs.Vajta, A.Wendt, R.Yokoyama, K.Yoshinaga

Nuclear structure of Te isotopes beyond neutron magic number N = 82

RADIOACTIVITY 137,138Sb(β-), (β-n), (β-2n)[from 9Be(238U, F), E=345 MeV/nucleon, followed by separation of fragments using BigRIPS and Zero-Degree spectrometer at RIBF-RIKEN facility]; measured yields of 137Sb 138Sb, Eγ, Iγ, γγ-coin, half-lives of decays of ground states of 137Sb and 138Sb using WAS3ABi detection system and EURICA array for γ rays. 135,136,137,138Te; deduced levels, J, π, β-, β-n and β-2n feedings, logft values. Systematics of energies of excited states in the Z=52-64(even) and N=85 isotones. Comparison with large-scale shell-model calculations.

NUCLEAR STRUCTURE 137,138Te; calculated levels, J, π, one-neutron spectroscopic factors for 137Te, B(E2), spectroscopic quadrupole moments and g factors for levels in 138Te using large-scale shell-model, with Napoli and N3LOP interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.103.034320
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2021ZH63      Phys.Rev. C 104, 064305 (2021)

W.Zhang, B.Cederwall, C.Qi, A.Ertoprak, O.Aktas, X.Liu, K.Andgren, K.Auranen, T.Back, L.Barber, G.Beeton, D.M.Cullen, I.G.Darby, M.R.Dimmock, S.Eeckhaudt, E.Ganioglu, M.Gorska, T.Grahn, P.T.Greenlees, B.Hadinia, E.Ideguchi, A.Illana, P.M.Jones, D.T.Joss, R.Julin, S.Juutinen, J.M.Keatings, A.Khaplanov, F.Kulali, M.Leino, M.Luoma, B.Lv, B.S.Nara Singh, L.Nelson, M.Niikura, M.Nyman, J.Ojala, R.D.Page, J.Pakarinen, E.S.Paul, C.Petrache, M.Petri, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, C.Scholey, J.F.Smith, J.Sorri, H.Tann, G.Zimba, J.Uusitalo, R.Wadsworth, R.Wyss

Identification of excited states in 10752Te55

NUCLEAR REACTIONS 58Ni(54Fe, 3n2p)107Te, E=195 MeV; 54Fe(58Ni, 3n2p)107Te, E=215 MeV; measured recoils, Eγ, Iγ, γγ-coin, (particle)γ-coin using EUROGAM array of 43 Compton-suppressed HPGe detectors and recoiling fusion evaporation products separated by RITU separator and implanted into two double-sided silicon strip detectors (DSSDs) of the GREAT spectrometer in 58Ni(54Fe, 3n2p) experiment, and using Jurogam III array of 15 Eurogam and 24 Euroball clover escape-suppressed Ge detectors, with evaporation products separated by MARA separator and implanted into the DSSD for the 54Fe(58Ni, 3n2p) experiment, both performed at the University of Jyvaskyla Accelerator Laboratory using recoil-decay tagging technique. 107Te; deduced high-spin levels, J, π, νh11/2 band. Comparison with large-scale shell-model calculations and total Routhian surface calculations. Systematics of νh11/2 bands and level structures in 107,109,111,113,115,117,119Te.

doi: 10.1103/PhysRevC.104.064305
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2020BA42      Nucl.Instrum.Methods Phys.Res. A979, 164454 (2020)

L.Barber, J.Heery, D.M.Cullen, B.S.Nara Singh, R.-D.Herzberg, C.Muller-Gatermann, G.Beeton, M.Bowry, A.Dewald, T.Grahn, P.T.Greenlees, A.Illana, R.Julin, S.Juutinen, J.M.Keatings, M.Luoma, D.O'Donnell, J.Ojala, J.Pakarinen, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, J.Sinclair, J.F.Smith, J.Sorri, P.Spagnoletti, H.Tann, J.Uusitalo, J.Vilhena, G.Zimba

A charge plunger device to measure the lifetimes of excited nuclear states where transitions are dominated by internal conversion

NUCLEAR REACTIONS 152Sm(32S, 4n)180Pt, E=165 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, 2+ state lifetime, B(E2). Charge plunger technique.

doi: 10.1016/j.nima.2020.164454
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2020BU01      Phys.Rev.Lett. 124, 042503 (2020)

P.A.Butler, L.P.Gaffney, P.Spagnoletti, K.Abrahams, M.Bowry, J.Cederkall, G.de Angelis, H.De Witte, P.E.Garrett, A.Goldkuhle, C.Henrich, A.Illana, K.Johnston, D.T.Joss, J.M.Keatings, N.A.Kelly, M.Komorowska, J.Konki, T.Kroll, M.Lozano, B.S.Nara Singh, D.O'Donnell, J.Ojala, R.D.Page, L.G.Pedersen, C.Raison, P.Reiter, J.A.Rodriguez, D.Rosiak, S.Rothe, M.Scheck, M.Seidlitz, T.M.Shneidman, B.Siebeck, J.Sinclair, J.F.Smith, M.Stryjczyk, P.Van Duppen, S.Vinals, V.Virtanen, N.Warr, K.Wrzosek-Lipska, M.Zielinska

Evolution of Octupole Deformation in Radium Nuclei from Coulomb Excitation of Radioactive 222Ra and 228Ra Beams

NUCLEAR REACTIONS 60Ni, 120Sn(222Ra, 222Ra'), (228Ra, 228Ra'), E=4.31 MeV/nucleon; measured reaction products, Eγ, Iγ. 222,228Ra; deduced γ-ray energies, dipole moments, quadrupole moments, E2 and E3 matrix elements, octupole collectivity.

doi: 10.1103/PhysRevLett.124.042503
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2020BU20      Nat. Commun. 11, 3560 (2020)

P.A.Butler, L.P.Gaffney, P.Spagnoletti, J.Konki, M.Scheck, J.F.Smith, K.Abrahams, M.Bowry, J.Cederkall, T.Chupp, G.de Angelis, H.De Witte, P.E.Garrett, A.Goldkuhle, C.Henrich, A.Illana, K.Johnston, D.T.Joss, J.M.Keatings, N.A.Kelly, M.Komorowska, T.Kroll, M.Lozano, B.S.Nara Singh, D.O'Donnell, J.Ojala, R.D.Page, L.G.Pedersen, C.Raison, P.Reiter, J.A.Rodriguez, D.Rosiak, S.Rothe, T.M.Shneidman, B.Siebeck, M.Seidlitz, J.Sinclair, M.Stryjczyk, P.Van Duppen, S.Vinals, V.Virtanen, N.Warr, K.Wrzosek-Lipska, M.Zielinska

Addendum: The observation of vibrating pear-shapes in radon nuclei

NUCLEAR REACTIONS 120Sn(222Rn, 222Rn'), E=4.23 MeV/nucleon; 120Sn(224Rn, 224Rn'), (226Rn, 226Rn'), E=5.08 MeV/nucleon; analyzed available data with updated computer codes. 222,224,226Rn; deduced additional γ-ray energies for high-spin transitions, J, π, level schemes, octupole-vibrational bands. Comparison with systematics of radon isotopes. Root analysis files.

doi: 10.1038/s41467-020-17309-y
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2020JU02      Phys.Rev. C 102, 034324 (2020)

A.Jungclaus, J.M.Keatings, G.S.Simpson, H.Naidja, A.Gargano, S.Nishimura, P.Doornenbal, G.Gey, G.Lorusso, P.-A.Soderstrom, T.Sumikama, J.Taprogge, Z.Y.Xu, H.Baba, F.Browne, N.Fukuda, N.Inabe, T.Isobe, H.S.Jung, D.Kameda, G.D.Kim, Y.-K.Kim, I.Kojouharov, T.Kubo, N.Kurz, Y.K.Kwon, Z.Li, H.Sakurai, H.Schaffner, Y.Shimizu, H.Suzuki, H.Takeda, Z.Vajta, H.Watanabe, J.Wu, A.Yagi, K.Yoshinaga, S.Bonig, J.-M.Daugas, R.Gernhauser, S.Ilieva, T.Kroll, A.Montaner-Piza, K.Moschner, D.Mucher, H.Nishibata, A.Odahara, R.Orlandi, M.Scheck, K.Steiger, A.Wendt

Evolution of proton single-particle states in neutron-rich Sb isotopes beyond N=82

RADIOACTIVITY 136,137,138Sn(β-)(β-n)[from 9Be(238U, F), E=345 MeV/nucleon, followed by separation and identification of fragments of interest using BigRIPS separator and ZeroDegree spectrometer, and implants deposited at WAS3ABi detector at RIBF-RIKEN facility]; measured Eγ, Iγ, Eβ, βγ- and γγ-coin using the EURICA array of Ge detectors, half-lives of decays of 136Sn, 137Sn and 138Sn. 136,137,138Sb; deduced levels, J, π, %β-n or Pn, β feedings, logft, configurations. Comparison with shell model calculations using the Napoli and N3LOP interactions. Systematics of first 5/2+ and 7/2+ states in 133,135,137,139,141Sb. 134,136,138Sb; calculated energies of levels in 0- to 7- spin range using shell model calculations using the Napoli and N3LOP interactions, and compared with experimental data. Systematics of experimental energies of the first 5/2+ and 7/2+ states in A=107-135, odd-A Sb isotopes.

doi: 10.1103/PhysRevC.102.034324
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2020KE07      Phys.Rev. C 102, 041304 (2020)

R.Kern, R.Zidarova, N.Pietralla, G.Rainovski, R.Stegmann, A.Blazhev, A.Boukhari, J.Cederkall, J.G.Cubiss, M.Djongolov, C.Fransen, L.P.Gaffney, K.Gladnishki, E.Giannopoulos, H.Hess, J.Jolie, V.Karayonchev, L.Kaya, J.M.Keatings, D.Kocheva, Th.Kroll, O.Moller, G.G.O'Neill, J.Pakarinen, P.Reiter, D.Rosiak, M.Scheck, J.Snall, P.-A.Soderstrom, P.Spagnoletti, M.Stoyanova, S.Thiel, A.Vogt, N.Warr, A.Welker, V.Werner, J.Wiederhold, H.De Witte

Restoring the valence-shell stabilization in 140Nd

NUCLEAR REACTIONS 208Pb(140Nd, 140Nd'), E=4.62 MeV/nucleon, [140Nd beam from Ta(p, X), E=1.4 GeV at HIE-ISOLDE-CERN, and isotopic selection by RILIS and REXEBIS]; measured Eγ, Iγ, scattered particles, (particle)γ- and (particle)γγ-coin using Miniball array and double-sided silicon strip detector (DSSD). 140Nd; deduced levels, J, π, Coulomb excitation cross sections, B(E2), B(E3), B(M1) by analyzing data using multistep Coulomb-excitation least-squares fitting code GOSIA, identification of the third 2+ state as the main fragment of the one-quadrupole-phonon proton-neutron mixed-symmetry state, and degree of F-spin mixing. Systematics of B(M1) strengths for N=80 isotones of 132Te, 134Xe, 136Ba, 138Ce and 140Nd, and compared with theoretical predictions.

doi: 10.1103/PhysRevC.102.041304
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2020SI09      Eur.Phys.J. A 56, 105 (2020)

J.Sinclair, M.Scheck, S.W.Finch, Krishichayan, U.Friman-Gayer, W.Tornow, G.Battaglia, T.Beck, R.Chapman, M.M.R.Chishti, Ch.Fransen, R.Gonzales, E.Hoemann, J.Isaak, R.V.F.Janssens, D.A.Jaroszynski, S.Johnson, M.D.Jones, J.M.Keatings, N.Kelly, J.Kleemann, D.Little, B.Loher, K.R.Mashtakov, M.Muscher, D.O'Donnell, O.Papst, E.E.Peters, D.Savran, M.Schilling, R.Schwengner, P.Spagnoletti, M.Spieker, V.Werner, J.Wilhelmy, O.Wieland, S.W.Yates, A.Zilges

Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes

doi: 10.1140/epja/s10050-020-00118-8
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2019BU29      Nat. Commun. 10, 2473 (2019)

P.A.Butler, L.P.Gaffney, P.Spagnoletti, J.Konki, M.Scheck, J.F.Smith, K.Abrahams, M.Bowry, J.Cederkall, T.Chupp, G.de Angelis, H.De Witte, P.E.Garrett, A.Goldkuhle, C.Henrich, A.Illana, K.Johnston, D.T.Joss, J.M.Keatings, N.A.Kelly, M.Komorowska, T.Kroll, M.Lozano, B.S.Nara Singh, D.O'Donnell, J.Ojala, R.D.Page, L.G.Pedersen, C.Raison, P.Reiter, J.A.Rodriguez, D.Rosiak, S.Rothe, T.M.Shneidman, B.Siebeck, M.Seidlitz, J.Sinclair, M.Stryjczyk, P.Van Duppen, S.Vinals, V.Virtanen, N.Warr, K.Wrzosek-Lipska, M.Zielinska

The observation of vibrating pear-shapes in radon nuclei

NUCLEAR REACTIONS 120Sn(222Rn, 222Rn'), E=4.23 MeV/nucleon; 120Sn(224Rn, 224Rn'), (226Rn, 226Rn'), E=5.08 MeV/nucleon; measured reaction products, Eγ, Iγ, γ-γ-coin., X-rays. 222,224,226Rn; deduced γ-ray energies, J, π, level schemes, octupole-vibrational bands, high-spin transitions. Comparison with systematics of radon isotopes. HIE-ISOLDE accelerator, Miniball spectrometer.

doi: 10.1038/s41467-019-10494-5
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2019GR06      J.Phys.(London) G46, 075101 (2019)

E.T.Gregor, N.N.Arsenyev, M.Scheck, T.M.Shneidman, M.Thurauf, C.Bernards, A.Blanc, R.Chapman, F.Drouet, A.A.Dzhioev, G.de France, M.Jentschel, J.Jolie, J.M.Keatings, T.Kroll, U.Koster, R.Leguillon, K.R.Mashtakov, P.Mutti, D.O'Donnell, C.M.Petrache, G.S.Simpson, J.Sinclair, J.F.Smith, T.Soldner, P.Spagnoletti, A.V.Sushkov, W.Urban, A.Vancraeyenest, J.R.Vanhoy, V.Werner, K.O.Zell, M.Zielinska

Decay properties of the 3-1 level in 96Mo

NUCLEAR REACTIONS 95Mo(n, 2γ), E cold; measured reaction products, Eγ, Iγ, γ-γ-coin.; deduced γ-ray energies and intensities, B(Eλ). Comparison with QRPA results.

NUCLEAR STRUCTURE 92,94,96,98Mo; calculated energy levels, B(Eλ) using QRPA approach.

doi: 10.1088/1361-6471/ab0b5e
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2019LE15      Phys.Lett. B 798, 134998 (2019)

M.C.Lewis, D.T.Joss, B.Saygi, R.D.Page, D.M.Cullen, L.Barber, M.M.Giles, J.Simpson, M.A.M.Al-Aqeel, H.Badran, T.Braunroth, A.D.Briscoe, T.Calverley, A.Dewald, M.Doncel, T.Grahn, P.T.Greenlees, C.Henrich, A.Herzan, R.-D.Herzberg, E.Higgins, J.Hilton, S.Ilieva, R.Julin, S.Juutinen, J.Keatings, T.Kroll, M.Labiche, K.Mashtakov, B.S.Nara Singh, E.Parr, J.Partanen, E.S.Paul, P.Rahkila, M.Sandzelius, J.Saren, C.Scholey, M.Siciliano, P.Spagnoletti, S.Stolze, S.V.Szwec, M.J.Taylor, J.Uusitalo

Lifetime measurements of excited states in 163W and the implications for the anomalous B(E2) ratios in transitional nuclei

NUCLEAR REACTIONS 106Cd(60Ni, X)163W, E=270 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, B(E2).

doi: 10.1016/j.physletb.2019.134998
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2019PA45      Phys.Rev. C 100, 044323 (2019)

E.Parr, J.F.Smith, P.T.Greenlees, K.Auranen, P.A.Butler, R.Chapman, D.M.Cox, D.M.Cullen, L.P.Gaffney, T.Grahn, E.T.Gregor, L.Grocutt, A.Herzan, R.-D.Herzberg, D.Hodge, U.Jakobsson, R.Julin, S.Juutinen, J.Keatings, J.Konki, M.Leino, P.P.McKee, C.McPeake, D.Mengoni, A.K.Mistry, K.F.Mulholland, B.S.Nara Singh, G.G.O'Neill, J.Pakarinen, P.Papadakis, J.Partanen, P.Peura, P.Rahkila, P.Ruotsalainen, M.Sandzelius, J.Saren, M.Scheck, C.Scholey, M.Siciliano, M.Smolen, J.Sorri, P.Spagnoletti, K.M.Spohr, S.Stolze, M.J.Taylor, J.Uusitalo

α-decay spectroscopy of the N=130 isotones 218Ra and 220Th: Mitigation of α-particle energy summing with implanted nuclei

RADIOACTIVITY 218Ra(α)[from α-decay of 222Th formed in 208Pb(18O, 4n), E=95 MeV]; 214Rn(α)[from α-decay of 218Ra]; 220Th(α)[from α-decay of 224U formed in 208Pb(20Ne, 4n), E=109 MeV]; 216Ra(α)[from α-decay of 220Th]; measured recoiling evaporation residues using RITU gas-filled recoil separator, Eα, Iα, Eγ, Iγ, αγ-coin, half-lives of decays of 218Ra, 214Rn, 220Th and 216Ra, α-branching ratio for decay to the g.s. and the first 2+ level in 214Rn using the GREAT spectrometer at Jyvaskyla accelerator facility; data analyzed using a newly developed technique to mitigate energy summing due to sequential short-lived α decays from nuclei implanted into a silicon detector. 214Rn; deduced 2+ level, α-hindrance factor. Comparison with previous experimental data.

doi: 10.1103/PhysRevC.100.044323
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2019ST13      Phys.Rev. C 100, 064304 (2019)

M.Stoyanova, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, M.Beckers, A.Dewald, M.Djongolov, A.Esmaylzadeh, C.Fransen, L.M.Gerhard, K.A.Gladnishki, S.Herb, P.R.John, V.Karayonchev, J.M.Keatings, R.Kern, L.Knafla, D.Kocheva, L.Kornwebel, Th.Kroll, M.Ley, K.M.Mashtakov, C.Muller-Gatermann, J.-M.Regis, M.Scheck, K.Schomacker, J.Sinclair, P.Spagnoletti, C.Surder, N.Warr, V.Werner, J.Wiederhold

Lifetimes of the 4+1 states of 206Po and 204Po: A study of the transition from noncollective seniority-like mode to collectivity

NUCLEAR REACTIONS 197Au(11B, 4n)204Po, E=55 MeV; 198Pt(12C, 4n)206Po, E=65 MeV; measured Eγ, Iγ, γγ-coin, level half-lives by γγ(t) fast timing technique using the HORUS spectrometer of the FN Tandem facility at the University of Cologne. 204,206Po; deduced levels, J, π, B(E2) for the first 4+ states in both the isotopes, and for the first 2+ in 204Po, configurations; discussed transition from single-particle seniority like mode to collective mode. Comparison with two-state mixing calculations. Systematics of energies, R4/2 ratios, B(E2) and magnetic moments for the yrast levels in 200,202,204,206,208,210Po.

doi: 10.1103/PhysRevC.100.064304
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2017GR06      Eur.Phys.J. A 53, 50 (2017)

E.T.Gregor, M.Scheck, R.Chapman, L.P.Gaffney, J.Keatings, K.R.Mashtakov, D.O'Donnell, J.F.Smith, P.Spagnoletti, M.Thurauf, V.Werner, C.Wiseman

Shell evolution of stable N = 50-56 Zr and Mo nuclei with respect to low-lying octupole excitations

COMPILATION 90,92,94,96,98,100Zr, 92,94,96,98,100,102Mo; compiled effective single-particle energies from available particle-transfer data; deduced E(0+2), E(2+1), E(4+1), E(3-1), B(E2), B(E3), single-particle energies of neutron subshells of odd-mass Zr and Mo isotopes. 90,92,94,96,98,100Zr; deduced type-II shape coexistence.

doi: 10.1140/epja/i2017-12224-7
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2017KO34      Eur.Phys.J. A 53, 175 (2017)

D.Kocheva, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, A.Astier, R.Altenkirch, S.Ansari, Th.Braunroth, M.L.Cortes, A.Dewald, F.Diel, M.Djongolov, C.Fransen, K.Gladnishki, A.Hennig, V.Karayonchev, J.M.Keatings, E.Kluge, J.Litzinger, C.Muller-Gatermann, P.Petkov, M.Rudigier, M.Scheck, Ph.Scholz, P.Spagnoletti, M.Spieker, C.Stahl, R.Stegmann, M.Stoyanova, P.Thole, N.Warr, V.Werner, W.Witt, D.Wolk, K.O.Zell, P.Van Isacker, V.Yu.Ponomarev

A revised B(E2;2+1 → 0+1) value in the semi-magic nucleus 210Po

NUCLEAR REACTIONS 208Pb(12C, 10Be), E=62 MeV; measured Eγ, Iγ(θ), γγ-coin, (particle)γ-coin using 11 HPGe, light reaction fragments using solar cells array. 210Po; deduced 2+1 state T1/2 using the line shape of the transition, branching ratios to this state from upper states, B(E1), B(E2), B(E3), B(M1), T1/2 of three states and transitions; calculated low-lying states energy, structure, B(E1), B(E2), B(E3), B(M1) using QPM (Quasiparticle Phonon Model). Compared with data.

doi: 10.1140/epja/i2017-12367-5
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2017KO38      Phys.Rev. C 96, 044305 (2017)

D.Kocheva, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, R.Altenkirch, S.Ansari, A.Astier, M.Bast, M.Beckers, Th.Braunroth, M.Cappellazzo, A.Dewald, F.Diel, M.Djongolov, C.Fransen, K.Gladnishki, A.Goldkuhle, A.Hennig, V.Karayonchev, J.M.Keatings, E.Kluge, Th.Kroll, J.Litzinger, K.Moschner, C.Muller-Gatermann, P.Petkov, M.Scheck, Ph.Scholz, T.Schmidt, P.Spagnoletti, C.Stahl, R.Stegmann, A.Stolz, A.Vogt, N.Warr, V.Werner, D.Wolk, J.C.Zamora, K.O.Zell, V.Yu.Ponomarev, P.Van Isacker

Low collectivity of the 2+1 state of 212Po

NUCLEAR REACTIONS 208Pb(12C, 8Be)212Po, E=64 MeV; measured Eγ, Iγ, (particle)γ-coin, half-life of the first 2+ state by recoil-distance Doppler-shift (RDDS) method at the FN Tandem facility of the University of Cologne. 212Po; deduced levels, J, π, B(E2). Comparisons with levels and B(E2) of 210Po and 210Pb, and with theoretical calculations using shell model. Systematics of B(E2) values for the first 2+ states in 20Ne, 44Ti, 52Ti, 136Te, 212Po, nuclei with two valence protons and two valence neutrons.

doi: 10.1103/PhysRevC.96.044305
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2017SC06      Acta Phys.Pol. B48, 547 (2017)

M.Scheck, S.Mishev, V.Yu.Ponomarev, O.Agar, T.Beck, A.Blanc, R.Chapman, U.Gayer, L.P.Gaffney, E.T.Gregor, J.Keatings, P.Koseoglou, U.Koster, K.R.Mashtakov, D.O'Donnell, H.Pai, N.Pietralla, D.Savran, J.F.Smith, P.Spagnoletti, G.S.Simpson, M.Thurauf, V.Werner

β Decay as a New Probe for the Low-energy E1 Strength

RADIOACTIVITY 136I(β-); deduced discrete levels, γ transitions intensity, level population probability, branching ratios, B(E1) using published data. Compared with results from 136Xe(γ, γ').

NUCLEAR REACTIONS 136Xe(γ, γ'), E not given; deduced discrete transitions intensity, level population probability, branching ratios, B(E1) using published data.

doi: 10.5506/APhysPolB.48.547
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